Memo
[prototype]humanoid · humanoids · 0 deployments in catalog
Manufacturer
SundayForm Factor
humanoid
Lifecycle
prototype
Operational Reality
Audited
Deployments
0
Target Price
Custom Quote
- HUMANOID
Description
Sunday is a Mountain View-based AI robotics startup building Memo, an autonomous wheeled humanoid home robot. Founded in 2023 by Stanford PhDs Tony Zhao and Cheng Chi, the company emerged from stealth in November 2025 with 5M in seed funding from Benchmark and Conviction, and subsequently raised a 65M Series B at a .15B valuation in March 2026. Memo is designed to learn household tasks autonomously using Sunday's ACT-1 foundation model, trained on zero robot data. A Founding Family Beta of 50 households is planned for late 2026.
Key facts & specs
- website
- https://www.globenewswire.com/news-release/2026/3/12/3254877/0/en/sunday-raises-165m-to-launch-first-autonomous-robots-by-thanksgiving.html
- maturity
- prototype
- lifecycle
- active
- form factor
- humanoid
- manufacturer
- Sunday
- Maturity stage
- prototype
- Funding
- $165M Series B (Mar 2026, Coatue-led, $1.15B valuation)
- C E O
- Tony Zhao
- Co-founder
- Cheng Chi
- Total funding
- 00M (5M seed + 65M Series B)
- Valuation
- .15B (Series B, March 2026)
- Key investors
- Benchmark, Conviction
- A C T-1
- frontier foundation model trained on zero robot data
- Beta
- 50 households, late 2026
Safety record
No incidents on record for Memo.
FAQ
What is Memo?
Sunday is a Mountain View-based AI robotics startup building Memo, an autonomous wheeled humanoid home robot. Founded in 2023 by Stanford PhDs Tony Zhao and Cheng Chi, the company emerged from stealth in November 2025 with 5M in seed funding from Benchmark and Conviction, and subsequently raised a 65M Series B at a .15B valuation in March 2026. Memo is designed to learn household tasks autonomously using Sunday's ACT-1 foundation model, trained on zero robot data. A Founding Family Beta of 50 households is planned for late 2026.
Is Memo actually deployed in the real world?
Memo is at the prototype stage: it exists, but DEPLOY has no verified real-world deployment on record. Manufacturer capability claims should be read as claims pending independent verification.
Who makes Memo?
Memo is made by Sunday, based in Mountain View, CA, USA, founded in 2023.
Can you buy Memo?
Memo is at prototype stage and is not yet available for sale.
What are alternatives to Memo?
On the DEPLOY registry, comparable humanoid robots to Memo include Walker S2, Digit, Unitree G1, Atlas.
How does Memo compare to Walker S2?
Memo and Walker S2 (UBTech Robotics · 18 deployments) are both humanoid robots on the DEPLOY registry. Memo has 0 verified deployments on record. Compare both records for specs, safety, deployments, and verified-vs-claimed autonomy.
Is Memo a top humanoid?
On DEPLOY's intelligence score, which blends verified deployments, safety, adoption, media, and IP signals, Memo ranks in roughly the top under 1% of humanoid models tracked by the registry.
What is Memo's maturity stage?
Memo is at the prototype stage on the DEPLOY maturity ladder (research, prototype, pilot, commercial, production). Prototype stage means demonstrations exist but commercial readiness is not yet established.
Where is Memo deployed?
No verified deployments of Memo are currently on the DEPLOY registry. DEPLOY records deployments only when verified at a named site with a primary source; absence may reflect pre-deployment, research, or manufacturer-internal use.
Is Memo safe?
Memo has no incidents on record in the DEPLOY registry. This does not constitute a safety guarantee; it reflects the incidents DEPLOY has tracked and verified to date.